Windshield wiper



July 13, 1937. M. ZAIGER i I 2,087,178

WINDSHIELD WIPER Filed June 24, 1936 2 Sheets-Sheet l 34 lnvenTor. Max Zoiger WMM2 W ATTys.

July 13, 1937. M. ZAIGER 2,087,178

WINDSHIELD WIPER Filed June '24, 1936 2 Sheets-Sheet 2 Fig.9.

3 I 6 a a 42 lnven'for.

Max Zuiger Patented: July 13, 1937 UNITED STATES PATIENT OFFICE wmnsnmnn WlPEii.

lilax Zaiger, Lynn, Mass. Application .im 24. 1936, serial No. 86.962 7 2 Claims. (01. 287-58) This invention relates to windshield wipers and it has for its objects to provide a windshield wiper with an improved extensible wiper-arm. I

In order to give an understanding of the invention I have illustrated in the drawings some selected embodiments thereof which will now be describedafter' which the novel features will be pointed out inthe appended claims. I

In the drawings;

.Fig. 1 is a side view' of a windshield wiper showing one embodiment of my invention;

Fig. 2 is a. fragmentary longitudinal section Fig. 9 is a fragmentary longitudinal section ofFiS. 8.

Fig. 10 is a section o n the line iii-l0, Fig. 9: v Fig. 11 isa section on the line ll-l i, Fig. 9; a Fig. 12 is a section on the line "-48, Fig. 9.

Referring first to Fig-1, i indicates generally the wiper blade and 2 is the wiper arm to which the blade is detachably secured. The wiper arm 2 is of the extensible typeso that it canbe lengthened or shortened to place the wiper element in diii'erent vertical positions; The wiper arm 2 comprisesthe upper section 8 which is fast to the oscillating rock shaft 4, and the lower section I which is an extensible section and which is pivotally connected to the upper section I, as shown at 9. The rock shaft is Journalled in and projects from the front I of the automobile andv isactuated by any suitable or usual actuating mechanism.

' The extensiblesection I of the wiper arm'comprises a tubular member 9, the upper end of which is mounted onthe pivot pin 9 and the rod memher 9 which telescopes within the tubular member 8 and to the end of which the. wiper blade is detachably, secured. The rod member s is flattened on one side, asshown at l9, and theflat side isprovided with a plurality of notches il adapted toengage a yielding retaining pawl or dog I! by which the rod member 9 is held in its I adjusted position. In the construction shown in v Fig. 4 is an enlarged section on the line Fig. 1 the retaining dog 12 is-formed on the end of a resilient arm it which is secured to the tubular member 8 at I. Said resilient arm I! is formed with two ears or wings l5 which embrace the tubular member -8 and thus retainthe 5 arm is in its proper. position. The resiliency of the arm 13 holds the dog l2 yieldingly against the flat face ill of the rod member 9, and said member 9 is withdrawn from the tubular memher to extend the wiper arm or is retracted with- 10 in the tubular member to'shorten the length of the wiper arm. The engagement of thedog 12 in a notch Ill serves to hold the extensible member,9 in its adjusted position.

The tubular member 9 is shown as. having an 15 opening it in which the dog or pawl l2 operates and said tubularmember is flattened'at the rear edge of the opening into contact with the hat side ll of the rod-9. as shown at IT. This flattened portion ll of the tubular member 8 accomplishes ,20 two p rposes. In the first place, it cooperates with the flat surface IQ of the rod 9 to prevent the rod from turning about its axis, and inthe second place it cooperates with the shoulder is with which the rod 9 is provided to prevent the rod 9from being withdrawn from the tubular member. The flattened surface It does not extend to the rearend oi the rod 9 but terminates at the shoulder is, the portion IQ of the rod beyond the shoulder being circular and fitting the interior of the tubular member 9.

I'he wiper arm is further provided with means for yleldingly holding the wiper blade against the glass II, and for this pufpose the wiper arm is formed with a spring member 2i which bears at its end against a roll 42 carried by the section 3 of the wiper arm. This spring not only serves to yieldingly hold the wiper blade against the glass 29, but it permits. the section 5 of the wiper arm to be swung away from the windshield when it is 40 v necessary to do so for replacing the wiper blade or cleaning the windshield.

The wiper blade I comprises a wiping element of rubberwhich is retained in the usual holder or backing member 22, the latter being of metal 45 and having a U shape in cross section to embrace the back edge ofthe wiping'element. The con-- struction shown in Fig. 6 is the well-known construction wherein the wiper blade is composed of a plurality of thin layers or plies 23 of flexible rubber. The wiper blade is provided with aresilient yoke member 2| which is provided with-a clip portion 25 by which the blade is secured to the end of the wiper arm.

The yoke member II is formed of a strip of 55 of the wiper b a-de and which is fastened thereto at its ends. One end of the yoke member 24 is formed with two ears 26 which embrace the holder 22 of the wiper blade, and the other end of the yoke is provided with two similar ears 23 which also embrace the-holder 22 of the wiper blade. These pairs of ears 26 and 28 may be secured to the holder 22 in any suitable way. As shownin Fig. 6, the ears 26 aresecured to the holder 22 by means of a rivet 21, while each 'ear 26 is provided with outwardly-directed projections 29 that are received in a groove 30 formed in the exterior face of each side of the holder 22.v These grooves 30 may be formed by indenting the sides 1 of the holder, thereby serving to secure the wiper element within the holder. The ears, 23 are preferably sufliciently resilient so thatthey can, be forced over the back of the holder, and when in place the inwardly-directed projections 28 will snap into the groove 30.

If desired, the ears 26 may be provided with the inwardly-directedmrojections 23 for securing said ears to the holder instead of the rivet 21.

By reason of the resilient yoke which extends or cheek pieces 3i, each of which is indented at 32 to form an inwardly-directed projection, said projections being opposite each other. This clip is adapted to be attached to wiper arms of various constructions. The wiper arm shown in Fig. 1, for instance, is formed at its end with two side flanges 33 adapted to receive the clip 25 between them. This. wiper arm is also formed at its end with a U'-shaped extension 34 whichis adapted to be entered between the cheek pieces 3| and to hook; under and around the inwardly-directed projections 32. Preferably the clip 25 will be somewhat narrower than the spacebetweenthe flanges 33 so as to-allow the wiper blade to flop slightly at the end of its stroke in each direction. .The cooperation of the U-shaped extension 34 with the clip serves to hold the yoke member 24, and thus the wiper blade, to the wiper arm while allowing the wiper blade to have any necessary flopping movement. 7

In Fig. 8 I have shown awipergarm embodying my invention having a slightly different con- 2,087,178 resilient sprin metal which extends lengthwise.

struction from that shown in Fig. 1. In this wiper arm the extensible section comprises a tubular member 35 similar to the member 3 in Fig. 1 and an extensible rod member 36 somewhat similar to the rod member 3 of Fig. 1. In the embodiment shown in Fig. 8, however, the rod member 36 is provided with the flattened face 31 on its inner side instead of on the outside,-and the notches 38 with which said flattened face is provided cooperate with a resilient pawl or dog 33 extending from the end of the tubular'member 35. Said tubular member 35 is indented near its end, as shownat 43, to provide a flat face to cooperate with the flat face 31 of the rod 36, thereby to prevent the rod from turning. This indentation 40 also cooperates with the shoulder 4| on the rod 36 to prevent the latter from being withdrawn from the tubular member 35.

The-wiper arm shown in Fig. 8 is formedat its end with a goosemecked portion 43 which is adapted to be received between the ears 3| of the clip 25 and to hook under the inwardlydirected projections 32. This serves to hold flexibly the wiper blade to the clip, and yet to allow the wiper blade to have any necessary flopping action. I

I claim: I 1

1. A windshield wiper arm for supporting a wiper blade, said arm comprising a tubular member, a wiper-carrying rod member telescoping within the tubular member and having a flat face provided with notches, said tubular member enclosing the portion of the rod member which telescopes therein and having a portion cooperating with said flat face ,to prevent the rod member from turning, and a resilient finger engaging said notches and holding the rod member in its adjusted position. i

2. A windshield wiper arm for supporting a wiper blade, said arm comprising a tubular member, a wiper carrying rod member telescoping within the tubular member and having a flat face provided with notches and an outwardly facing shoulder at one end of said face, said tubular member enclosing the portion of the rod member member, and a resilient flnger engaging said hotches and holding the rod member in its adjusted position.

2 Max ZAIGER.

45 which telescopes therein and having an indented 

